Assembly of stills including those (I assume) responsible
Para los que leen español mejor que yo...
https://www.marambio.aq/pdf/herculesbombardero.pdf
Looks an interesting document on Hercules Ops in 1982.
Courtesy of goggle translate:
Therefore, it was necessary to attack the enemy supply lines, that is, to restrict the freedom action of English traffic on the high seas; in this case it was going to be a distant air interdiction, given the distances that the designated aircraft should travel. One study determined that the most suitable aircraft for the task was the C-130 H Hercules, because had a great range that could be increased, there was the possibility of adding something some type of weaponry and there were crew members who were trained in search and rescue, in aeromaritime exploration and in performing autonomously in different types of air operations; this proposal was approved by the CAE. The aircraft with registration TC - 68 was assigned for the task and it was determined that due to its technical capacity the modifications had to be carried out in the Military Aircraft Factory (Córdoba). The engineering studies determined that the following modifications be made:
- installed four fuel pylon tanks – originally designed for mounting under the wings – inside the cargo hold to increase its endurance (approximately 19.00 flight hours)
- in the two external stations, in the place of the two fuel tanks, they adapted two MER (multiple ejection racks) multiple bomb racks to it, in which it could carry up to six 250-kilogram bombs in each (twelve in all)
- in the pilot's position on the dashboard an SFON shooting sight as used in Pucará aircraft, was placed,
- added a button to fire the bombs to the control yoke in the pilot's position
- In the co-pilot's position, on the right panel, the control box for the weapons system, which was from where its use was enabled
The device was rudimentary and the aircraft had not been designed to perform that type of task; therefore the probability of hitting a naval target was remote, but it was fulfill one of the objectives of aerial interdiction, which is to "interfere" or annoy the enemy.